National Donut Day is on the first Friday of every June. The holiday was established in 1938 to celebrate the Salvation Army Workers (“Doughnut Girls”) who supplied free donuts to American troops during WWI. Another holiday celebrating the ubiquitous fried treat is National Doughnut Appreciation Day, which falls on November 5.

The origin of the name “doughnut” is unclear. Some researchers suggest the name refers to the nuts that were placed inside the ball of dough to compensate for the uncooked center. Other researchers claim it refers to “dough knots,” which was the shape for early doughnuts.

A glazed doughnut has about 240 calories, of which 120 are from fat. A Krispy Kreme raspberry jam-filled doughnut has about 300 calories, and a Krispy Kreme chocolate iced doughnut has about 350 calories.

Ten people in the United States have the last name Doughnut or Donut. Ninety-five people have the name Longjohn (the name of a long doughnut). Twelve people have the name Bearclaw, 498 people have the name Sprinkles, 470 people in the U.S. have the name Fritter, and 1,634 have the name Sugar.